[MaryBau]

Hi all;

I have a 128^3 DNS velocity field that I need to filter and map into a 64^3 mesh to run a LES simulation.

The mapFields utility only interpolates, and it does not really filter the velocity field. Is that correct?

Is there already a utility in OF that can filter a field? or I will need to code it myself?

Thanks

[Tobi]

Dear Mary,

1. mapFields, just maps (interpolates) the values from one mesh to another one
2. What do you mean with "filter".

[MaryBau]

Hi Tobi,

Thanks for replying.

I want to "filter" my velocity field, using a sharp cutoff filter in the Fourier space.

I need to filter to make sure that my velocity correlations remain consistent. I believe a simple interpolation might not necessarily preserve the correct turbulence statistics.

Thanks,

Mary